#173D83#173D83

#173D83 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.7% C 0.126 H 261.3°. Best body text is #FFFFFF at 10.34:1 contrast (WCAG AA passes).

Color values

HEX	#173D83
RGB	rgb(23, 61, 131)
HSL	hsl(219, 70%, 30%)
HSV	hsv(219, 82%, 51%)
CMYK	cmyk(82.4%, 53.4%, 0%, 48.6%)
CIE-LAB	lab(27.18, 14.26, -43.16)
CIE-LCH	lch(27.18, 45.46, 288.28°)
OKLab	oklab(37.7% -0.019 -0.1243)
OKLCH	oklch(37.7% 0.126 261.3)
XYZ	xyz(6.1173, 5.1576, 22.1414)
Luminance	0.0516 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D83 #835D17

analogous

#177383 #173D83 #271783

triadic

#173D83 #83173D #3D8317

tetradic

#173D83 #831773 #835D17 #178327

square

#173D83 #831773 #835D17 #178327

split-complementary

#173D83 #832717 #738317

monochromatic

#050D1B #0E254F #173D83 #2055B7 #3872DC

Accessibility & contrast

On white

10.34

#173D83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#173D83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D83

10.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D83	#FFFFFF	#000000	##FFFFFF
##173D83	1.00	10.34	2.03	10.34
#FFFFFF	10.34	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D4586

Deuteranopia (green-blind)

#003C82

Tritanopia (blue-blind)

#004E5A

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173d83;
/* rgb */ color: rgb(23, 61, 131);
/* oklch */ color: oklch(37.7% 0.126 261.3);

Tailwind

colors: {
  custom: {
    50: '#6771a8',
    500: '#173d83',
    950: '#000000',
  },
}

SCSS

$custom: #173d83;
$custom-light: #6771a8;
$custom-dark: #000000;

JSON

{
  "hex": "#173d83",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 131
  },
  "hsl": {
    "h": 218.889,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.37704,
    "c": 0.1258,
    "h": 261.3
  },
  "luminance": 0.05158
}

Semantic roles & 50–950 ramp

primary

#173D83

secondary

#B78D3F

accent

#AE3BED

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173D83

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →